APPENDIX MOLLU8CA. 555 



heavy varix, crenulated by the spiral sculpture. Major diameter 

 84, minor -66; height -84 mm. 



Dredged off Tutaga Islet at a depth of 200 fathoms, and off 

 Beacon Islet (Funamanu) at 150 fathoms. 



This, the smallest known Liotia, is well distinguished by its 

 simple and massive sculpture. 



MECOLIOTIA, gen. nov. 



A genus of the Liotiidse, distinguished from Liotia by an 

 elevated spire of six whorls, an obliquely truncate base and granose 

 sculpture. 



The type species appears to me to be co-generic with Iphitus 

 tuberculatus, Watson.* The genus Iphitus was founded by 

 Jeffreys on a single immature specimen,! and is known from 

 Watson's rather than from Jeffreys' account. Jeffreys placed the 

 genus in the Littorinidte and Fisher in the Fossaridie. My specias 

 cannot enter either of these families, nor, I should think, could /. 

 tuberculatus. We are however, relieved from the unsatisfactory 

 genus of Jeffreys by the fact that Iphitus is preocupied in 

 Mollusca by Rafinesque.J In Hemiptera Stal introduced Iphita 

 in 1870. 



Type, Mecoliotia halligani. 



MECOLIOTIA HALLIGANI, sp. nov. 



(Fig. 68.) 



Shell small, most massive, conical, 

 with obliquely truncate base, narrowly 

 perforate. Colour white. Whorls six 

 of which two are apical, separated by 

 deeply impressed sutures. Sculpture 

 the third has one, the fourth and fifth 

 each two, and the last whorl three, 

 prominent, heavy, spiral keels. These 

 are overridden and knotted by longi- 

 tudinal ribs, which on the last whorl 

 number seventeen, cross from umbilicus 

 to suture, and mount the upper whorls 

 perpendicularly and continuously. Deep 

 square pits are enclosed by the inter- 

 section of this sculpture. The first whorl is rounded, the second 

 keeled. The base is hollow beneath the periphery, with a central 



* Watson Chall. Rep., Zool., xv., 1886, p. 583, pi. xlvi., fig. 5. 

 t Jeffreys Proc. Zool. Soc., 1883. p. 113, pi. xx., fi-j. 1-'. 

 J Rafinesque Anal. Nat., 1815, p. 141. 

 Stal Sv. Ak. Handl., 1870, p. 99. 



